A new study finds replacing that old mattress could improve sleep quality and reduce sleep related back discomfort. Researchers recorded the reported back discomfort and sleep quality for 28 consecutive days with 30 female and 29 male subjects sleeping in their existing beds (average age of beds was 9.5 years old). Subject's beds were then replaced by new, medium-firm beds and again, their sleep quality and back discomfort were tracked. Researchers noted a significant improvement between pre and post test sleep quality and efficiency. Thus, if you feel that your bed has turned into a boxing ring for your body, perhaps it's time to consider a replacement. Of course, it's important to have yourself checked by a licensed chiropractor if you are experiencing any back pain or discomfort to ensure there isn't a more serious underlying condition present.